Safety check for window sashes



April 1935- c. w. CARVETTE 2,038,827 4 SAFETY CHECK FOR WINDOW SASHES Filed June 22, 1935 2 Sheets-Sheet l April 28, 1936.

C. W. CARVETTE' SAFETY CHECK FOR WINDOW SASHE S 2 Sheets-Sheet 2 Filed June 22, 1935 I nvenlor (flaw/as W 'arveiie Patented Apr. 28, 1936 UNITED STATES PATENT OFFICE 2 Claims.

This invention relates to the broad class of building and construction hardware and has more specific reference to a safety appliance in the nature of an attachment for a conventional v sliding window sash, the attachment being expressly constructed to function as. a check or stop device so as to limit the upward sliding movement of the lower sash and the downward sliding movement of the upper sash.

The invention may be accredited as possessing the requisite structure to serve as a reliable safety appliance susceptible of being brought into play at the discretion of the user, whereby to allow the lower sash to be raised for ventilation purposes l5 but to at the same time prevent it from being top ventilation while at the same time forestalling entry of unauthorized persons.

' Considered briefly as aunit, the preferred embodiment of the'invention comprises a flanged receptacle or bushing constructed to accommodate an automatic spring released plunger, said plunger constituting the projectable check or stop pin, and means being provided for positively holding said pin projected whenit is purposely adjusted to function as asafety or precautionary .sash retaining means.

The specific or detailed assembly constituting the accepted type of the invention will bediscovered in the succeeding detailed description and the companion illustrative drawings.

In the drawings wherein like numerals are employed to designate like parts throughout the views:

Figure l is a fragmentary portion of a window frame with complemental upper and lower sliding sashes, the lower sash being provided with the safety appliance presently to be explained in detail.

50 Figure 2 is a vertical sectional view taken approximately on the plane of the line 2-2 of Figure 1 observing the structure at right angles to Figure 1.

Figure 3 is a view of the invention per se show- 5 ing the plunger in its normal position in full lines and in its projected retention position in dotted lines.

Figure 41s a horizontal or longitudinalsectional view through Figure 3 showing additional details.

Figure 5 is an elevational view of therectilinear "5 reciprocatory plunger unit.

Figurefi is a detail 'view of themanually controlled latch or fastener.

Figure '7 is a cross section, slightly enlarged, on the plane of the line of Figure 4. 10 Figure-8 is a cross section through the lower rail of the upper sash illustrating the metallic wear plate orcleat.

Figure 9 is a view of the cleat alone.

- In Figures 1 and 2 the window frame is denoted l5 bythe letter A, the upper'sash is indicated atjiB and the lower sash at C. For a purpose to behereinafter described the lower double edged rail .D of the sash B is provided with a mortise into which an L-shaped wear plate or cleat I0 is. fitted. 20 Thispart I0 is merely .a collateral feature which is recommended for use in connectionwithzthe check device now to be described.

Referring now to Figure 3, it will be observed thatthe flanged receptacle is in fact a cylinder I lof appropriate proportion whichis designedzto be fitted intoa bore provided in the intermediate portion ofone of the vertical rails l2 of :the lower sash as shown for example in Figures ,Land2. iThe flange is indicated at 13 andis of appropriate shape and drilled to accommodate fastening screwsto facilitate its application and :maintenance as also shown in Figure 1. At apredeter mined .point the flange is formed with a screw threaded tapto accommodate the -screw;-threade.d 5 attaching shank 14 of a vertically borejdifltting [5. This fitting serves as an adapter dorflcarrier for a gravity drop latch. Specifically-the latch comprises a cylindrical stem 16 'vertically'workable in aguidepassage in theifitting'andprovided '40 with afingerg-rip or knob I l. The stemilfiisprovided ,witha guide notch I18 to accommodate :a. complemental guide pin l9 carried by the fitting. This is merely a convenient assembling arrangement. The idea is to provide the flange with a knob-equipped gravity drop pin which functions as a retaining latch for the rectilinear or reciprocatory plunger unit 20. As shown in Figure 5, this unit comprises a spindle portion 2| which is mounted for reciprocation in the cylinder or bushing I I. At its outer end it is provided with an enlarged knurled head 22 having a keeper socket 23 properly arranged to allow the latch pin is to drop into it when it is in registry therewith as indicated in dotted lines in Figure 3. Alongitudinal groove 24 is formed in this spindle portion and constitutesa keyway to receive the projecting end of the removable key or stud 25 also "carried by the attaching flange I 3. This stud extends into the keyway. as shown in'Figure 4 I and prevents rotation of the plunger in the cylinder so as to properly match the keeper socket 23 with the latch pin IS. The left hand end portion 26 of the plunger is cylindrical and slidable through a guide aperture inthe corresponding endv of the cylinder, being surrounded by a coiled expansion spring 21 confined in said cylinder. The spring bears at one end against the shoulder 28 and at its opposite end against the, annular apertured end. portion of thecylinder 'l I. 'This is an expedient of practical value in that the spring expands to normally retract the pin 26. The pin when projected functions as the, safety check or stop means. It might also be said that 1; the aforementioned detent 'or'stud 26 cooperates with the keyway 25 in limiting the expansive action of' the spring "so as to maintain the plunger properly assembled injthe cylinder.

In operation and use the vertical sash rail [2 is bored to permit cylinder I I to be mounted therein and to be attached inplace through the instrumentality of the attachingfiange IS." The which projects the pin 26 into the path of movement of the sash rail D," The pin 26 is held in this position through the instrumentality of the latch l6 dropping into the keeper socket 23. With o the pin thus projected the upward opening movement of the sash D is limited becauserthe pin 26 .tion of the attaching fitting I 5 which in turn comes into contact with the wear plate l0 assuming, of course,--that-the wear plate It) has been properly positioned. By the same token, when a thesash-C is closed and the sash B is dropped down the rail D comes intocontact with the pin '26 and limits the downward sliding movement of said sashB. j

' Novelty is predicated upon the adoption and use of the simple economical flanged receptacle or cylinder l I designed to accommodate the automatically retracted safety plunger 20, wherein said plunger is of the type shown in Figure 5, and especially provided with a keeper socket-23 to ac- .commodate the automatically dropping latch pin 16. Explicit novelty resides in the multiple funcflange I 3 in that it serves not only to fasten the device on the sash but serves asa mountingfor the detachable key or detent.

25: aswell as a means to adequately support the provides a novel adapter for the catch or latch it. it is believed to be practicable and feasible to make these parts separate and detachable so that they may be replaced and also properly adjusted when slight inconsistencies occur at the time of manufacture and assembly. Then, too, this arrangement permits the major part to be made of properly tempered case hardened steel, particularly suitable for safety check of this type.

It is-thought that persons skilled in the art to which the invention relates will be able to obtain a clear understanding of the invention after considering the description in connection with the drawings. Therefore, a more lengthy description is regarded as unnecessary.

Minor changes in shape, size and rearrangement of details coming within the, field of invention claimed may be resorted to in actual practice, if desired.

Having thus described the invention, what is claimed as new'is: a V

1. As a new article of manufacture, a component part of an assemblage of the class described comprising a cylinder formed at one end with afiange, said flange being provided with a removable detent pin, being further provided with a screwthreaded opening, an adapter fitting havmg a screw threaded shank threaded into said opening, said adapter fitting having a guide passage, a cylindrical latch sage and provided on its accessible end with an operating knob, together with readily accessible retaining means on said adapter fitting to retain the latch pin against accidental displacement.

' 2. In a safety check sash retention device of the class described, with an attaching flange, an adapter element adjustably mounted on said flange and projecting at right angles therefrom, said adapter element having a vertical guide passage, a cylindrical latch pin slidable in said guide passage and being provided on its'upper accessible end with an operating knob, readily accessible retaining means on said adapter to retain the latch pin against accidental displacement, a reciprocal plunger having a cylindrical spindle portion at one end terminating in a finger gripping knob and being provided at its opposite spindle portion engaging and maintaining the latch pin in raised unlatching position when the plunger is in retracted position, a spring mounted- Q on the check pin and bearing against the shoul- V tuting a keeper seat for the latch pin.

pin slidable in said pasa cylinder formed at one end a radial socket constiend with a reduced cylindrical sash retention and check pin, the cylindrical,

' oHARLEs'w. CARVETTE; f 

